Well-strainer.



No. 890,598. PATENTED JUNE 16, 1908.

A. M. BROWN. WELL STRAINER.

APPLICATION FILED DEG. 12, 1907.

Witnesses attorney UNITED STATES PATENT oHFIoE.

ARTHUR M. BROWN, OF HOUSTON, TEXAS, ASSIGNOR or oNn-HA'LF To e. w. STANCLIFF, or

'- 4 HOUSTON, TEXAS.

WELL-STRAINER.

Specification of Letters Patent.

Patented June 16, 1908.

To all whom it may concern: 7

Be it known that I, ARTHUR M. BROWN, a citizen of the United States, residing at Houston, Harris county, Texas, have invented certain new and useful Im rovements in Well-Strainers, and I do here y declare the following to be, a full, clear, and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same;

This invention relates to certain improvements in strainers or screens for well tubes,

pipes or casings; and the objects and nature of the invention will be readily understood by those skilled in the art in the light of thefollowing explanation of thestructure shown in theaccompanying drawings as my preferred embodiment from among other formations or arrangements within the spirit and scope of my invention. 1

An object of the invention is to provide certain improvements in inserted bar strainers with the end in view of reducing the cost of production and at the same time producing a strainer of efliciency and 'of marked advantage and utility.

The invention consists in certain novel features in construction and in combinations and arrangements as more fully and particu-. larly set forth hereinafter.

Referring to the accompanying drawings: Figure 1, is a perspective view showing a portion of a tube, plpe or casing formed in accordance with my lnvention, certain of the 'cordance wit Fig. 3 is a cross section on liquid inlet 0 enings being screened in acmy invention while other opemngs are shown to which the screening bars have not been applied. Fig. 2, is a longitudinal section the line 33, Fig.

1. Fig. 4,is a plan of several of the bars assembled showing the inner faces thereof.

I Fig. 5, is a plan thereof showing their outer faces. Fig. 6, is a side view of one of the bars.

In the drawings, I show a section of a tube, pipe or casing 1, such as employedin an oil, water or other well, or wherever a strainer can be used to advantage. The ortion 1, illustrated is employed at the li uid inlet or receiving portion ofthe; pipe. e pi e is formed with spaced inlet openings 2. hese openings can be arranged in series around t e pi e,as well as in series longitudinally thereo and any suitable number of openings can be employed uniformly spaced or otheron the line 2-2Fig. 1..

Wise,1and all of the same size or area or shape or form.

In the specific example illustrated, the openings are of a uniform size and shape and are uniformly-spaced, and each opening is oblong in shape and arranged longitudinally of the pipe, although I do not Wish to so llmit my lnvention.

Each opening through the wall of the pipe is shown formed with strai ht flat paral el side Walls, and with inward curving transverse or end Walls 3, thereby formingv an o ening of uniform width from the exterior of the pipe to the interior thereof, but of greater length at the exterior of the pipe than at the interior thereof, or in other Words the opening tapers or reduces inwardly in length.

If so desired, the transverse walls 3, can concave or curve from a common center or of the same radius, whereby a rotary cutting tool can be employed to quickly and economically cut the slots or openings through the pipe wall, all of the same area and imensions.

Each opening 2, is screened or rovided with a straining surface composed o a series of parallel abutting usually similar and separatelyformed bars 4,.inserted and secured inthe openin and arranged longitudinally thereof and filing the same from side wall to side Wall.

Each bar is composed of anelongated thin plate of suitable metal, swaged, pressed or reduced on both side faces of its intermediate portion to form the fiat transverse angular or uniformly inclined converging faces 5, extending from the fiat outer longitudinal edge 6, of the bar and practically meeting at the sharp or thin inner longitudinal edge7, of the bar. Said thin inner edge 7 of the bar is in length practically equal to the length of the ly concaved ormner opening or side of the opening 2, inthe pi e. Thebar is swaged or reduced at its si e faces 5, to form the liquid inlet slits or passages 9, through the assembled bars and also to form the similar fiat op osite end heads 8, of the bar which close t e ends of said slits through or between the assembled bars. The reduced side portions or faces 5, of the bar usually taper or reduce in length from the outer to the inner edge of the bar, and the opposite ends of side faces 5, termi- Hate in beveled faces 10, joining the fiat parend heads allel side faces of the end heads 8, and said inclined side faces 5, between said end heads.

The flat bottom or inner edges 11 of the end heads 8, are longitudinally curved outwardly to conform to the curvature of the end walls 3,.of the openings, and to rest on said walls, while the outer longitudinaledges 12, of said heads are usually extended inwardly at an angle. The end heads 8,- are usually formed with parallel side faces and are preferably of the same thicknessthroughout and are of greater thickness than any part of the intermediate portion of the bar etween said end heads.

Each liquid inlet 0 ening 2, in the pipe is practically'filled or ridged by a series of these similar bars'arranged side by side in parallelism'with the flat side faces of their directly abutting. and thereby spacing the depressed side faces 5, of the bars to form the liquid inlet slits or passages -be-- with the outer surface of the pi e, and'the' under or inner edges of the en heads rest on and abut against the curved end walls of said inlet openings, while the-reduced ends caused by outer inclined edges-12, leave V depressions over the reduced ends of the bars and the upper portions of the end walls of the inlet openlngs into which solder, spelter or the like 13, can be run to fill the depressions and fasten and secure the setof bars in the opening.

The bars are separately formed and are loosely placed together and inserted in the inlet opening, and are therein secured by the solder or by other suitable means.

The slits between the strainer bars .taper or increase inwardly in Width, so that the inflowing liquid can force grit-and hard particles of sand or the like inwardly from the slits and thus permit clearing thereof.-

If the strainer needs cleaning, a cylindrical .wire brush ofgreater diameter than the casing can be inserted therein and reciprocated longitudinally 1n the strainer section, and the strainer bars are so formed and arranged that the brush wires will project through the slits between the strainer bars and cutout and force therefrom gum, paraffin or other substance which may have collected therein.

The bars are usually composed of metal,

such as brass or other suitable metal capable of resisting the action of water or oil. The openings can. be economlcally cut or formed in the pipe witlifcomparati ve'speed and the bars can e made at a comparatively low cost, and easily and-quickly inserted and secured in the inlet openings. By varying the thickness of the end heads, the bars can "be made to roduce the narrow water inlet slits of the esired width to suit conditions. It is evident that various changes might be resorted to in theforms, dimensions, and arrangements of the parts described without departing from the spirit and sco e of my invention hence I do not wish to to the exact construction disclosed.

WhatIclaimisF 1. A pipe having an inlet opening theremit myself through having flat parallel SldG WfillS and inwardl curved approximately converging end wa s, and a strainer secured-in said parallel abutting bars having depressed intermediate portions forming the inlet. slits, substantially as described.

2. A ,,pipe

through, in combination with screens in said openings, each screen consisting essentially o a series of parallel abutting separately formed bars inserted in the opening and engaging the end walls thereof and having reduced portions forming intervening mlet slits, and means extending across the outer .openingand consisting of a series of similar I having inlet openings there 7 I faces of the opposite bar ends in the o ening and fixing the series of bars therein, su stantially as described. 3. A pipe having an inlet openingtherethrough formed withconver'ging end walls, in combination with a strainer for said opening consisting of a series of parallel separate bars inserted and secured insaid opening and resting against said end .walls, said bars formed with abutting end heads and with intermediate de ressed portions.

4. A pipe aving an elongated opening therethrough with inwardly converging end walls, and flat parallel side walls in combination with a series of parallel similar bars at .their ends fitting and secured on said end walls, the end walls ing inlet slits. p 5. A- strainer for pipes comprising a'serles of parallel abutting bars adapted to be inserted and secured .in an inlet opening in a pipe, each bar formed with similar endheads and transversely de ressed at the opposite faces of the interme 'ate portion to form the inwardly converging inclined side faces, said end heads'having inner converging bearing portions of the bars between said eing separated to form intervenfaces, and being reduced attheir outer edges.

6.. As a new article of manufacture, 'a strainer bar for inserted bar well fpipe strainers, consisting of an elongated at piece of metal having 0 posite end heads and intermediate inclined side faces converging from the outer longitudinal edge of the bar to the ,inner. longitudinal edge thereof between the se ans end heads, said end heads having longitudinally converging bearing faces at their inner edges, substantially as described. v

7. A pipe having an inlet 0 ening With inwardly converging opposite wa ls, in combination with a seriesiof parallel similar strainer bars inserted and secured in said opening and having end heads engaging said Walls, said bars formed with depressed longitudinal opposite side faces converging inwardly and decreasing inwardly in length, whereby the bars form intervening slit inlet passages increas' ing inwardly in width and decreasing inwardly in length. 8. A pipe having inlet openings therein and arranged longitudinall opening having flat para el longitudinal Walls and inwardly curved converging end walls, and a strainer secured in said opening and consisting of a series of separately formed abutting bars having depressed intermediate ortions forming longitudinal inlet slits, the ar ends having inner converging bearing faces resting on said end walls, and means securing the bars on said end walls.

thereof, each 9'. A casing formed with an inlet opening having inwardly curved converging end walls, and a series of strainer bars secured in and arranged longitudinally of said opening and fitted on said end walls, intermediate longitudinal portions of said bars having inclined side faces separated to form inlet slits between the bars, substantially as described.

10. A pipe having an inlet .opening with opposite converging walls, and a series of strainer bars inserted in said opening and having depressed side faces to form intervening inlet slits, the bar ends having inner bearing faces resting on said converging walls and having outer reduced faces, and securing means for the bars inserted in the ends of the opening and down on said reduced outer faces of the bars.

In testimony whereof I affix my signature, in presence of two witnesses.

ARTHUR M. BROWN.

Witnesses Louis 'WIED, J. M. WINFREY. 

